Battery top cover and battery

Abstract

The utility model relates to the technical field of battery production, and discloses a battery top cover and a battery, the battery top cover comprises a top cover body, a pole, a sensor module and a first insulating part, a first mounting hole and a second mounting hole are formed in the top cover body; the pole is mounted in the second mounting hole; the sensor module is arranged in the first mounting hole in a penetrating manner, a first limiting structure is arranged on the side wall of the top of the sensor module, a sensor is arranged in the sensor module, and an air inlet communicated with the sensor is formed in the bottom of the sensor module; the first insulating part is provided with a first through hole and a second through hole. According to the battery top cover disclosed by the utility model, the side wall of the top of the sensor module is provided with the first limiting structure, and the first insulating part is provided with the second limiting structure which is matched with the first limiting structure to limit the sensor module to move along the axial direction, so that the sensor module is prevented from being separated from the first through hole, and the reliability of the whole structure is further improved; and the installation mode is simple, so that the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery production technical field, especially a kind of battery top cover and battery. BACKGROUND

[0002] At present, with the continuous development of energy storage industry, lithium ion battery is widely used due to its high capacity and other excellent characteristics. Lithium ion battery is mainly composed of aluminum shell and top cover, wherein the aluminum shell has an opening, and the top cover is closed at the opening of the aluminum shell, thereby forming a closed energy storage system with corresponding energy storage structure and material in the closed system.

[0003] In the use process of lithium ion battery, a large amount of heat and gas will be generated due to charge and discharge cycle, which poses a significant challenge to the performance, safety and maintenance of the battery. In particular, the accumulation of gas can cause the battery to swell, thereby affecting the reliability and service life of the battery.

[0004] In the prior art, in order to effectively monitor the temperature and pressure and other key data inside the battery, the sensor module is usually welded on the top cover of the battery to monitor the internal data of the battery. However, this way of fixing the sensor module is more complex, thus reducing the production efficiency. SUMMARY

[0005] In order to solve the problems of the prior art, the utility model provides a battery top cover and a battery. The side wall of the top of the sensor module is provided with a first limiting structure, and the first insulating part is provided with a second limiting structure cooperating with the first limiting structure to limit the axial movement of the sensor module, so as to prevent the sensor module from coming out of the first through hole, thereby improving the reliability of the overall structure, and the installation method is simple, thus improving the production efficiency.

[0006] The technical effects achieved by the utility model are realized by the following aspects:

[0007] In a first aspect, the utility model provides a battery top cover, comprising:

[0008] a top cover body having a first mounting hole and a second mounting hole;

[0009] a pole mounted in the second mounting hole;

[0010] a sensor module inserted into the first mounting hole, wherein the side wall of the top of the sensor module is provided with a first limiting structure, the inside of the sensor module is provided with a sensor, and the bottom of the sensor module is provided with an air inlet hole communicating with the sensor; and

[0011] The first insulating piece is provided with a first through hole and a second through hole. The first through hole is sleeved with the outer periphery of the sensor module. The first insulating piece is provided with a second limiting structure near the first through hole, which cooperates with the first limiting structure to limit the axial movement of the sensor module. The second through hole is sleeved with the outer periphery of the pole. The bottom surface of the first insulating piece is in abutment with the top surface of the top cover body.

[0012] In some implementations, the first limiting structure includes a boss provided on the side wall of the top of the sensor module and extending in the radial direction. The second limiting structure includes an abutment portion provided on the top surface of the first insulating piece and in abutment with the bottom surface of the boss.

[0013] In the present implementation, when assembled, the boss of the sensor module is in abutment with the abutment portion of the first insulating piece, thereby limiting the axial movement of the sensor module and preventing the sensor module from being pulled out of the first through hole, and ensuring the assembly fastening of the overall structure.

[0014] In some implementations, the first limiting structure includes a limiting groove provided on the side wall of the sensor module. The second limiting structure includes a protruding portion extending from the periphery of the first through hole to the center of the first through hole.

[0015] In some implementations, the first insulating piece is provided with a first anti-rotation structure near the first through hole. The top cover body is provided with a second anti-rotation structure near the first mounting hole, which cooperates with the first anti-rotation structure to limit the circumferential rotation of the first insulating piece.

[0016] In the present implementation, the first anti-rotation structure cooperates with the second anti-rotation structure to limit the circumferential rotation of the first insulating piece, thereby improving the connection stability between the first insulating piece and the top cover body, and further ensuring the reliability of the first insulating piece in fixing the sensor module to the top cover body.

[0017] In some implementations, the first anti-rotation structure includes a clamping column provided on the bottom surface of the first insulating piece. The second anti-rotation structure includes a clamping hole provided on the top surface of the top cover body and cooperating with the clamping column for clamping.

[0018] In some implementations, the battery top cover further includes a second insulating piece. The top surface of the second insulating piece is in abutment with the bottom surface of the top cover body. The second insulating piece is provided with a first communication hole and a second communication hole. The side wall of the bottom of the sensor module is provided with a third limiting structure. The sensor module is arranged in the first communication hole. The second insulating piece is provided with a fourth limiting structure near the first communication hole, which cooperates with the third limiting structure to limit the axial movement of the sensor module. The pole is arranged in the second communication hole.

[0019] In the present implementation, the third limiting structure of the sensor module and the fourth limiting structure of the second insulating piece cooperate with each other to limit the axial movement of the sensor module, prevent the sensor module from being pulled out of the first communication hole, and thus improve the connection stability between the sensor module and the second insulating piece.

[0020] In some implementations, the third limiting structure includes a bottom plate provided on the side wall of the bottom of the sensor module and extending in the radial direction, and the fourth limiting structure includes a limiting groove provided on the bottom surface of the second insulating piece and matched with the bottom plate.

[0021] In some implementations, the second insulating piece is provided with a first anti-rotation structure near the first communication hole, and the sensor module is provided with a second anti-rotation structure matched with the first anti-rotation structure to limit the circumferential rotation of the sensor module.

[0022] In the present implementation, the first anti-rotation structure and the second anti-rotation structure cooperate with each other to limit the circumferential rotation of the sensor module, and thus improve the connection stability between the sensor module and the second insulating piece.

[0023] In some implementations, the first anti-rotation structure includes an anti-rotation hole provided on the bottom surface of the second insulating piece, and the second anti-rotation structure includes an anti-rotation column provided on the bottom plate and matched with the anti-rotation hole.

[0024] In some implementations, a sealing piece is arranged between the sensor module and the first communication hole.

[0025] In some implementations, a diaphragm covering the air inlet hole is mounted on the bottom of the sensor module.

[0026] In some implementations, a mounting groove surrounding the air inlet hole is provided on the bottom surface of the sensor module, and the diaphragm is mounted in the mounting groove.

[0027] In a second aspect, the utility model provides a kind of battery, comprising:

[0028] Shell, including the accommodating cavity with opening;

[0029] Electrode assembly, is installed in the accommodating cavity;And

[0030] The battery top cover described above;The battery top cover covers the opening.

[0031] In summary, the utility model has at least the following advantages:

[0032] The battery top cover provided by the utility model has the first installation hole and the second installation hole in the top cover body, the sensor module is arranged in the first installation hole, the pole is arranged in the second installation hole, the first insulation piece has the first through hole and the second through hole, the first through hole is sleeved with the outer periphery of the sensor module, and the second through hole is sleeved with the outer periphery of the pole, so that the sensor module and the pole are arranged on the top cover body, the side wall of the top of the sensor module is provided with the first limiting structure, the first insulation piece is provided with the second limiting structure matched with the first limiting structure to limit the axial movement of the sensor module, the sensor module is prevented from being taken out of the first through hole, the reliability of the overall structure is improved, and the production efficiency is improved due to the simple mounting mode. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a structural schematic view of the battery top cover of example 1.

[0034] Figure 2 It is a partial enlarged view of the battery top cover shown in the figure. Figure 1

[0035] Figure 3 It is a partial sectional view schematic view of the battery top cover shown in the figure. Figure 1

[0036] It is a structural schematic view of the first anti-rotation structure of example 1. Figure 4

[0037] It is a structural schematic view of the second anti-rotation structure of example 1. Figure 5

[0038] It is a structural schematic view of the second insulation piece of example 1. Figure 6

[0039] It is a structural schematic view of the fourth limiting structure of example 1. Figure 7

[0040] It is a structural schematic view of the third limiting structure of example 1. Figure 8

[0041] It is a structural schematic view of the battery of example 3. Figure 9 MARKS IN THE FIGURE:

[0042] 1, battery top cover;

[0043] 10, top cover body; 11, first installation hole; 12, second installation hole; 13, second anti-rotation structure;

[0044] 20, pole;

[0045]

[0046] ​​30, sensor module; 31, first limiting structure; 311, boss; 312, limiting groove; 32, air inlet hole; 33, third limiting structure; 34, second anti-rotation structure; 35, sealing element; 36, diaphragm; 37, mounting groove;

[0047] 40, first insulating element; 41, first through hole; 42, second through hole; 43, second limiting structure; 431, abutting portion; 432, protruding portion; 44, first anti-rotation structure;

[0048] 50, second insulating element; 51, first communication hole; 52, second communication hole; 53, fourth limiting structure; 54, first anti-rotation structure;

[0049] 2, battery;

[0050] 60, housing; 61, accommodating cavity;

[0051] 70, electrode assembly. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0053] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0054] Example 1:

[0055] Please refer to the drawings Figure 1 The drawings Figure 8 The battery top cover 1 of the present application comprises a top cover body 10, a pole 20, a sensor module 30 and a first insulating element 40.

[0056] Among them, please combine Figure 1 and Figure 2 , Figure 1 The structural relationship among the top cover body 10, the pole 20, the sensor module 30 and the first insulating element 40 in the embodiments of the present application is shown, Figure 2The structural relationship between the first limiting structure 31 and the second limiting structure 43 in the embodiment of the utility model is shown. Specifically, the top cover body 10 is provided with a first mounting hole 11 and a second mounting hole 12; the pole 20 is installed in the second mounting hole 12; the sensor module 30 is arranged in the first mounting hole 11, the side wall of the top of the sensor module 30 is provided with the first limiting structure 31, the inside of the sensor module 30 is provided with a sensor, and the bottom of the sensor module 30 is provided with an air inlet hole 32 communicated with the sensor; the first insulating part 40 is provided with a first through hole 41 and a second through hole 42, the first through hole 41 is sleeved on the outer periphery of the sensor module 30, the position of the first insulating part 40 close to the first through hole 41 is provided with the second limiting structure 43 matched with the first limiting structure 31 to limit the axial movement of the sensor module 30, the second through hole 42 is sleeved on the outer periphery of the pole 20, and the bottom surface of the first insulating part 40 abuts against the top surface of the top cover body 10.

[0057] In the embodiment, the top cover body 10 is provided with the first mounting hole 11 for installing the sensor module 30 and the second mounting hole 12 for installing the pole 20, the first insulating part 40 is provided with the first through hole 41 and the second through hole 42, the first through hole 41 is sleeved on the outer periphery of the sensor module 30, and the second through hole 42 is sleeved on the outer periphery of the pole 20, so that the first insulating part 40 simultaneously installs the sensor module 30 and the pole 20 on the top cover body 10, the assembly time is reduced, and thus the production efficiency is improved. The inside of the sensor module 30 is provided with a sensor, and the bottom is provided with the air inlet hole 32 communicated with the sensor, when the sensor module 30 is arranged in the first mounting hole 11, the sensor module 30 can obtain the data such as the air pressure and / or temperature inside the battery through the air inlet hole 32, so as to realize the active safety monitoring of the data such as the air pressure and / or temperature inside the battery. Specifically, the side wall of the top of the sensor module 30 is provided with the first limiting structure 31, the position of the first insulating part 40 close to the first through hole 41 is provided with the second limiting structure 43, the second limiting structure 43 abuts against the first limiting structure 31, so as to limit the axial movement of the sensor module 30, the fastening of the structure assembly is improved, the bottom surface of the first insulating part 40 abuts against the top surface of the top cover body 10, so that the overall structure is more compact. It should be noted that the first insulating part 40 can be formed on the outer periphery of the sensor module 30 and the pole 20 by injection molding and abut against the top surface of the top cover body 10.

[0058] The battery top cover 1 has the first mounting hole 11 and the second mounting hole 12, the sensor module 30 is arranged in the first mounting hole 11, the pole 20 is arranged in the second mounting hole 12, the first insulating part 40 has the first through hole 41 and the second through hole 42, the first through hole 41 is sleeved with the outer periphery of the sensor module 30, the second through hole 42 is sleeved with the outer periphery of the pole 20, so that the sensor module 30 and the pole 20 are arranged on the top cover body 10, the side wall of the top of the sensor module 30 is provided with the first limiting structure 31, the first insulating part 40 is provided with the second limiting structure 43 matched with the first limiting structure 31 to limit the axial movement of the sensor module 30, so that the sensor module 30 is prevented from being separated from the first through hole 41, and the reliability of the overall structure is improved, and the installation mode is simple, so that the production efficiency is improved.

[0059] In some preferred embodiments, please refer to Figure 3 , Figure 3 The structural relationship between the boss 311 and the abutting portion 431 in the embodiment of the utility model is shown. Specifically, the first limiting structure 31 comprises the boss 311 arranged on the side wall of the top of the sensor module 30 and extending in the radial direction, and the second limiting structure 43 comprises the abutting portion 431 arranged on the top surface of the first insulating part 40 and abutting with the bottom surface of the boss 311. When assembling, the boss 311 of the sensor module 30 abuts on the abutting portion 431 of the first insulating part 40, so that the axial movement of the sensor module 30 is limited, the sensor module 30 is prevented from being separated from the first through hole 41, and the assembly fastening of the overall structure is ensured.

[0060] In some preferred embodiments, the first limiting structure 31 comprises the limiting groove 312 arranged on the side wall of the sensor module 30, and the second limiting structure 43 comprises the convex portion 432 extending from the periphery of the first through hole 41 to the center of the first through hole 41. When the sensor module 30 is arranged in the first through hole 41, the convex portion 432 is deformed to avoid the sensor module 30 so as to be sleeved with the sensor module 30, and the convex portion 432 is restored to the original shape when being clamped in the limiting groove 312. Of course, when the first insulating part 40 is sleeved with the outer periphery of the sensor module 30 by the injection molding mode, the convex portion 432 is integrally formed with the first insulating part 40 in the limiting groove 312.

[0061] In some preferred embodiments, please refer to Figure 4 and Figure 5 , Figure 4 and Figure 5The utility model discloses an embodiment shows the structure relation of first anti -rotation structure 44 and second anti -rotation structure 13, specifically, first insulation piece 40 is equipped with first anti -rotation structure 44 in the position close to first through -hole 41, and top cap body 10 is equipped with the second anti -rotation structure 13 with first anti -rotation structure 44 cooperation to restrict the rotation of first insulation piece 40 along the circumference in the position close to first installation hole 11.

[0062] In some preferred embodiments, the first anti-rotation structure 44 includes a clamping column provided on the bottom surface of the first insulation piece 40, and the second anti-rotation structure 13 includes a clamping hole provided on the top surface of the top cap body 10 and cooperating with the clamping column. When the bottom surface of the first insulation piece 40 abuts against the top surface of the top cap body 10, the clamping column is clamped in the clamping hole, so that the first insulation piece 40 is clamped on the top cap body 10, preventing the first insulation piece 40 from rotating circumferentially, and further ensuring the fastening of the sensor module 30 on the top cap body 10.

[0063] In some preferred embodiments, please refer to Figures 6 to 8 , Figure 6 The utility model discloses an embodiment shows the structure relation of second insulation piece 50 and sensor module 30, Figure 7 and Figure 8 The utility model discloses an embodiment shows the structure relation of third limiting structure 33 and fourth limiting structure 53. Specifically, the battery top cover 1 further includes a second insulation piece 50, the top surface of the second insulation piece 50 abuts against the bottom surface of the top cap body 10, the second insulation piece 50 is provided with a first communication hole 51 and a second communication hole 52, the sidewall of the bottom of the sensor module 30 is provided with a third limiting structure 33, the sensor module 30 is arranged in the first communication hole 51, the second insulation piece 50 is provided with a fourth limiting structure 53 close to the first communication hole 51, which cooperates with the third limiting structure 33 to limit the axial movement of the sensor module 30, and the pole 20 is installed in the second communication hole 52. The sensor module 30 is installed in the first communication hole 51 and the first installation hole 11 at the same time, the third limiting structure 33 of the sensor module 30 and the fourth limiting structure 53 of the second insulation piece 50 cooperate with each other to limit the axial movement of the sensor module 30, preventing the sensor module 30 from being pulled out of the first communication hole 51, thereby improving the connection stability between the sensor module 30 and the second insulation piece 50.

[0064] In some preferred embodiments, the third limiting structure 33 comprises a bottom plate arranged on the side wall of the bottom of the sensor module 30 and extending radially, and the fourth limiting structure 53 comprises a limiting groove arranged on the bottom surface of the second insulating member 50 and matched with the bottom plate. When the sensor module 30 is installed in the second communication hole 52, the bottom plate is embedded in the limiting groove, which avoids the problem that the sensor module 30 moves axially and then comes out of the second communication hole 52, and makes the overall structure more compact. Preferably, the bottom plate is integrally formed with the side wall of the bottom of the sensor module 30, or the bottom plate is welded with the side wall of the bottom of the sensor module 30.

[0065] In some preferred embodiments, the second insulating member 50 is provided with a first anti-rotation structure 54 near the first communication hole 51, and the sensor module 30 is provided with a second anti-rotation structure 34 matched with the first anti-rotation structure 54 to limit the rotation of the sensor module 30 in the circumferential direction. When the sensor module 30 is arranged in the first communication hole 51, the bottom plate of the sensor module 30 is embedded in the limiting groove of the second insulating member 50, and the first anti-rotation structure 54 and the second anti-rotation structure 34 are matched with each other to limit the rotation of the sensor module 30 in the circumferential direction, which improves the connection stability between the sensor module 30 and the second insulating member 50.

[0066] In some more preferred embodiments, the first anti-rotation structure 54 comprises an anti-rotation hole arranged on the bottom surface of the second insulating member 50, and the second anti-rotation structure 34 comprises an anti-rotation column arranged on the bottom plate and matched with the anti-rotation hole. When the bottom plate of the sensor module 30 is embedded in the limiting groove, the anti-rotation column is matched with the anti-rotation hole, so that the bottom plate is matched with the second insulating member 50, which prevents the sensor module 30 from rotating in the circumferential direction, and further ensures the installation stability of the sensor module 30. Preferably, the anti-rotation hole is arranged on the bottom wall of the limiting groove, and the anti-rotation column is arranged on the periphery of the bottom plate.

[0067] Embodiment 2:

[0068] The difference between this embodiment and embodiment 1 is that the battery top cover 1 of the utility model is further optimized in structure in this embodiment, please refer to the structure of the battery top cover 1 in the drawings. Figure 8 .

[0069] In this embodiment, the sealing member 35 ensures the air tightness between the sensor module 30 and the second insulating member 50, and further ensures the sealing of the battery, so that the sensor arranged in the sensor module 30 can obtain the information such as air pressure and / or temperature in the battery through the air inlet hole 32, and the purpose of active safety is achieved.

[0070] In this embodiment, the sealing member 35 ensures the air tightness between the sensor module 30 and the second insulating member 50, and further ensures the sealing of the battery, so that the sensor arranged in the sensor module 30 can obtain the information such as air pressure and / or temperature in the battery through the air inlet hole 32, and the purpose of active safety is achieved.

[0071] In some preferred embodiments, the bottom of the sensor module 30 is provided with a diaphragm 36 covering the air inlet hole 32. When the conductive medium inside the sensor module 30 is a liquid medium such as silicone oil, the diaphragm 36 is deformed under the influence of the air pressure inside the battery, which is further transmitted to the liquid medium and then to the sensor, so that the sensor can sense the change of the air pressure inside the battery, thereby realizing active safety monitoring.

[0072] In some more preferred embodiments, the bottom surface of the sensor module 30 is provided with a mounting groove 37 surrounding the air inlet hole 32, and the diaphragm 36 is mounted in the mounting groove 37. This makes the overall structure more compact, while also limiting and protecting the diaphragm 36, so that the diaphragm 36 is arranged opposite the air inlet hole 32, improving the reliability of the air pressure conduction inside the battery.

[0073] Embodiment 3:

[0074] This embodiment is based on the above-mentioned embodiments, and provides a battery 2, please refer to the attached Figure 9 .

[0075] A battery 2, comprising a shell 60, an electrode assembly 70 and the above-mentioned battery top cover 1.

[0076] Among them, the shell 60 includes a containing cavity 61 with an opening; the electrode assembly 70 is installed in the containing cavity 61; the battery top cover 1 covers the opening.

[0077] In this embodiment, the electrode assembly 70 is an electric core formed by winding or stacking a diaphragm, a positive plate and a negative plate. The above-mentioned battery 2 can be a lithium ion battery, a sodium ion battery.

[0078] The battery 2 of the utility model, the top cover body 10 is provided with first installation hole 11 and second installation hole 12, sensor module 30 is arranged in first installation hole 11, pole 20 is installed in second installation hole 12, first insulation piece 40 is provided with first through hole 41 and second through hole 42, first through hole 41 is sleeved on the outer periphery of sensor module 30, second through hole 42 is sleeved on the outer periphery of pole 20, to install sensor module 30 and pole 20 on top cover body 10, the side wall of the top of sensor module 30 is provided with first limiting structure 31, first insulation piece 40 is provided with second limiting structure 43 with first limiting structure 31 to limit the axial movement of sensor module 30, avoid sensor module 30 from first through hole 41, further improve the reliability of the overall structure, and the installation mode is simple, thus improve production efficiency.

[0079] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through the intermediate medium, can be two element internal communication or two element mutual action relation.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0080] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and so on is based on the orientation or position relation shown in the drawing, or the orientation or position relation of the utility model product when it is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.In addition, the terms "first", "second", "third" and so on are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0081] In addition, the terms "horizontal", "vertical", "overhang" and so on do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined."Horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0082] In the utility model, unless another definite provision and limitation, the first feature above or below the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0083] Although the description of the utility model is combined with the above specific embodiments, it is obvious that many substitutions, modifications and changes can be made by the person skilled in the art according to the above content.Therefore, all such alternatives, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A battery top cover characterized by, The utility model relates to a top cover body (10) is provided with first installation hole (11) and second installation hole (12), the pole (20) is installed in second installation hole (12) inside, sensor module (30) is threaded in first installation hole (11) inside, the side wall of the top of sensor module (30) is equipped with first limiting structure (31), the inside of sensor module (30) is equipped with sensor, the bottom of sensor module (30) is equipped with with sensor intercommunication air inlet hole (32), and first insulation piece (40) is equipped with first through hole (41) and second through hole (42), first through hole (41) is sleeved in the outer periphery of sensor module (30), and the position close to first through hole (41) of first insulation piece (40) is equipped with with first limiting structure (31) cooperation to limit the axial movement of sensor module (30) second limiting structure (43), and second through hole (42) is sleeved in the outer periphery of pole (20), and the bottom surface of first insulation piece (40) is in abutment with the top surface of top cover body (10). The first limiting structure (31) includes a boss (311) provided on the side wall of the top of the sensor module (30) and extending in the radial direction, and the second limiting structure (43) includes an abutment portion (431) provided on the top surface of the first insulation piece (40) and in abutment with the bottom surface of the boss (311). The first limiting structure (31) includes a limiting groove (312) provided on the side wall of the sensor module (30), and the second limiting structure (43) includes a protruding portion (432) extending from the periphery of the first through hole (41) to the center of the first through hole (41). The first insulation piece (40) is provided with a first anti-rotation structure (44) at the position close to the first through hole (41), and the top cover body (10) is provided with a second anti-rotation structure (13) at the position close to the first installation hole (11) and matched with the first anti-rotation structure (44) to limit the circumferential rotation of the first insulation piece (40). The first anti-rotation structure (44) includes a clamping column provided on the bottom surface of the first insulation piece (40), and the second anti-rotation structure (13) includes a clamping hole provided on the top surface of the top cover body (10) and matched with the clamping column for clamping.

2. The battery header of claim 1, wherein, ​ 3. The battery header of claim 1, wherein, ​ 4. The battery header of claim 1, wherein, ​ 5. The battery header of claim 4, wherein, ​ 6. The battery header of claim 1, wherein, The battery top cover (1) further comprises a second insulating piece (50), a top surface of the second insulating piece (50) abuts against a bottom surface of the top cover body (10), the second insulating piece (50) is provided with a first communication hole (51) and a second communication hole (52), a side wall of a bottom portion of the sensor module (30) is provided with a third limiting structure (33), the sensor module (30) is arranged in the first communication hole (51), a position of the second insulating piece (50) close to the first communication hole (51) is provided with a fourth limiting structure (53) matched with the third limiting structure (33) to limit axial movement of the sensor module (30), and the pole column (20) is arranged in the second communication hole (52).

7. The battery header of claim 6, wherein, The third limiting structure (33) comprises a bottom plate arranged on the side wall of the bottom portion of the sensor module (30) and extending in a radial direction, and the fourth limiting structure (53) comprises a limiting groove arranged on the bottom surface of the second insulating piece (50) and matched with the bottom plate for clamping.

8. The battery header of claim 7, wherein, The position of the second insulating piece (50) close to the first communication hole (51) is provided with a first anti-rotation structure (54), and the position of the sensor module (30) close to the first communication hole (51) is provided with a second anti-rotation structure (34) matched with the first anti-rotation structure (54) to limit circumferential rotation of the sensor module (30).

9. The battery header of claim 8, wherein, The first anti-rotation structure (54) comprises an anti-rotation hole arranged on the bottom surface of the second insulating piece (50), and the second anti-rotation structure (34) comprises an anti-rotation column arranged on the bottom plate and matched with the anti-rotation hole for clamping.

10. The battery cup of claim 6, wherein: A sealing piece (35) is arranged between the sensor module (30) and the first communication hole (51).

11. The battery cup of claim 1, wherein: A diaphragm (36) covering the air inlet hole (32) is arranged on the bottom portion of the sensor module (30).

12. The battery header of claim 11, wherein, A mounting groove (37) arranged around the air inlet hole (32) is arranged on the bottom surface of the sensor module (30), and the diaphragm (36) is arranged in the mounting groove (37).

13. A battery, characterized by Comprise: a housing (60) comprising a containing cavity (61) with an opening; an electrode assembly (70) arranged in the containing cavity (61); and the battery top cover (1) of any one of claims 1 to 10, wherein the battery top cover (1) covers the opening. ​

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